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Cipher and secret letter and telegraph code, with Hogg's improvements. The most perfect code ever invented or discovered. Impossible to read without the key. Invaluable for secret, military, naval, and diplomatic services, as well for brokers, bankers, and merchants.


Published 1884, 2d ed.
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15 p. 12 x 15 cm.


Publisher New York, Van Nostrand
Pages 40
Language English
Digitizing sponsor Duke University Libraries
Book contributor Nicholas Gessler
Collection dultc; americana

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